Pumping-jack.



W. NI. BEST & W. P. CUNNINGHAM.

PUWIPING JACK.

APPLICATION FILED Aus.2l,. 1915.

'L L5. Patented Jan. 9,1917.

WILLIAM M. BEST AND WINTFORD P. CUNNINGHAM, 0F MORRIS, OKLAHOMA.

PUMPING-J'ACK.

Application ed August 21, 1915.

To all whom t may concern Be it known that we, VILLIAM M. BEs'r and WINTFORD P. CUNNINGHAM, citizens of the United States, residingat Morris, in the county of Okmulgee and State of Oklahoma, have invented certain new and useful Improvements in Pumping-Jacks; and we do declare the following to be a full, clear, and exact descript-ion of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in pumping jacks such as are used for applying power to pumps and the like.

rThe object of the invention is to provide a very simply constructed jack which will be, nevertheless, very strong and not likely to get out of order. In carrying out this object, a number of castings are used-to connect the several parts of the device.

With this'general object in View, the invention resides in the combination and arrangement of parts to be hereinafter more particularly described and claimed.

1n the accompanying drawingsz-Figure 1 represents a perspective view of a com plete pumping jack constructed in accordance with our invention; Figs. 2 to 8 are similar views of a number of castings used in this machine.

Referring more particularly to the drawings wherein similar reference characters indicate like parts throughout the several views, the numeral 1 denotes a substantially inverted l'lV-shaped supporting frame, the base or horizontal portion of which is formed of a pair of spaced apart rectangular bars or strips 2 of wood or metal rigidly connected together by the brace strips 3. The upright part of this frame 1 is also formed 'of a pair of spaced bars 4 connected together by means of the brace strip 5 and held rigidly with respect-to the bars 2 by means of the inclined brace bars 6 which are connected to the latter.

rLlhe upper end of each of the bars 4 has a right angular bearing plate 7 disposed thereon, the vertical portion of each plate being secured to the outer side of the bars. The horizontal parts of the plates 7 each has a bearing recess 8 to receive the pivot studs 9 which extend `from opposite sides of a block 10. The sides of the block from which the studs 9 project are shouldered as shown at 11 to receive the central parts of a pair of beams 12 which together form the walking Specication. of Letters Patent.

Patented Jan.. 9, 19317..

Serial N o. 46,760.

beam of the jack. From Fig. 1 it will be seen that the middle part of the block serves to spacethe beams 12 apart, and is secured thereto by bolts or the like. `The outer ends of the beams 12 are also spaced apart by means of blocks 13 and 14. The block 13 has a plate 15 secured to its upper face or formed integrally therewith, and the side edges of this plate preferably extend beyond the edges of the block 13 and are disposed over the upper edges of the beams 12 plate 17 projects beyond the block 14 as.

shown and has a slot 18, thus providing a pair of fingers 19 having alined seats 20 to receive the upper ends or cross bar 21 of a pump rod 22. The rod 22 extends through an opening 23 formed in one of the brace strips 3, thereby providing a guide.

The walking beam is caused to operate on its pivots 9 by a rocker 24 in the form of a bell crank, the arms of which are preferably at right angles to each other. rlhe rocker comprises a pair of upright spaced bars 25, the same being held apart at their lcxver ends by means of the combined spacing and attaching lug 26'formed on the pivot rod 27. The upper ends of these bars are spaced by means of a spacing member 28 which will later be more particularly described. rlhe horizontal arm of the rocker is also formed with a pair of spaced bars 29, one end of each of which is disposed in engagement with the outer face of each of the bars 25. rThe ends of the bars and 29 rest upon the pivot rod 27 which is flattened as shown at 30 on each side of the lug 26. r1`he other ends of the bars 29 are also spaced apart by a spacing member 31, the construction of which will be later pointed out. rThe ends of the pivot rod 27 are disposed in suitable bearings 32 carried by the horizontal portion of the supporting frame 1.

The spacing member 28 is substantlally T- shaped in cross section and is formed of a plate 33 and a rib 34, the latter being disposed between the bars 25 and the former engaging one side thereof. A plurality of seats 35 are formed in the plate 33 in any one of Which may be disposed an attaching end of a power rod 36 by which motion is transmitted from an engine or the like to the rocker. By providing a number of seats, the rod 36 may be adjusted so as to move the rocker a greater or less'amount as desired. The other' spacing member which is also in the form ofa casting comprises a base plate 37, a rib 38 and an end plate 39, the rib 38 being designed to space the ends of the bars 29, the end plate 39 engaging the ends thereof, and the base plate 3T underlying the rame. One or more bolts are passed through the rib 38 and the parts to be attached thereto. The inner portions of each side of the rib 38 are removed to form a thinner rib as shown at 40. This arrangement allows the lower ends of brace bars 41 to be more effectively attached to the casting and the ends of the bars 29. brace bars 4l are attached to the upper ends of the bars 25 by the bolt. which holds the same to the spacing member 28.

The rocker 24 is operatively connected to the Walking beam by means of a yoke 42, the latter being formed of a pair of upright bars 43 connected by cylindrical cross bars 44. The bars 43 are disposed on the opposite Sides of the walking beam and the bars 29, While the connecting or cross bars JA engage the plates 15 and 37 respectively. It might be here mentioned that the plate, l5, has a plurality of seats 4:5, in any one of which the c'ross bar 44 is disposed, this construction allowing the amount of movement lof the parts to be-Varied.

From the foregoing description taken in connection with the drawings, it will he seen that we have invented a rather simple, yet obviously a very strong pumping jack which can be manufactured inevpensivelyv because of the simplicity of its parts. The castings which connect the various beams and bars are all of simple nature and can be very quickly formed and the parts can be easily attached thereto. This allows the jack to be readily disassembled for transportation or storage andl it may be set up by even an unskilled mechanic.

Te claim as our invention l. In a pumping jack of the class described, a supporting frame, a beam pivoted thereto, a bell crank comprising a pivot rod journaled in said frame and having an apertured lug extending from one side thereof, said pivot rod on each side of said lug being flattened, a pair of upright'spaced bars, one disposed on each side of said lug.'a spacing block disposed between the upper ends of said bars, a second pair of substantially horizontal spaced bars disposed one on each side of said lug. a fastening element extending through said lug and the adjacent ends of The upper ends of thesesaid bars, an additional spacing block dis posed between the outer ends of the second pair of bars, means connected with the bell crank to operate the same, and a connection between said bell crank and beam.

2. In a. deviceof the class described, a supporting frame, a beam pivoted thereto, a bell crank comprising a .pivot member, a pair of upright spaced bars connected by one end -to said pivot member, a spacing member disposed between the other ends of said bars, a second pair of substantially horizontal spaced bars connected by one end to said pivot member, a spacing member disposed between the other ends of said second pair of bars. sai-d spacing member consisting of a `base plate disposed beneath the bottom of said bars, a rib formed on said base plate to space said bars apart, an end plate engaging the ends of said bars and connected to said rib and base plate. and a pair of brace bars connected b v one of the first mentioned pair of spaced bars, their other ends being connected to said last mentioned spacing member, the rib thereof being cut away to receive said brace bars, means connected with the bell c ank to operate the same, and a connection between said beam and bell crank. j

3. In a pumping jack -of the class described, a supporting frame, a. beam pivoted thereto, a bell crank comprising a pivotl member, a pair of upright spaced vbars connected at their lower ends with said pivot member, a spacing member disposed between the other ends of said bars, said member consisting` of a rib disposed between said bars, and a pla-te connected with said rib and disposed in engagement with one face of said bars, said member being substantially T-shaped in cross section, said plate having a. pluralit)Y o f seats therein, a second pair of substantiall)v horizontal space-d bars'connected at one end to said pivot member, a spacing member disposed between the other ends of said second pair of bars, a connection between said beam and bell crank, an operating rod connected with any one of said seats in the first mentioned spacing member.

4. ln scribed. pivoted prising a pumping jack of the class dea supporting frame, a bell crank in said frame, a walking beam coma pair of spaced beams. a spacing block disposed between the central portions of said beams` pivot studs projecting from opposite sides of said spacing member, bearing members carried by said frame toreceive, said pivot studs. and a connectionbetween said walking beam and the bell crank.

In a pumping jack of the class de- 'scribed` a supporting frame having a pair of upright spaced bars. a right angularbearing plate disposed on the upper end of each of said bars, the horlzontal portion ,of each of said plates having a seat therein, a walking beam comprising a pair of spaced beams, a spacing block disposed between the central portions of said beams, pivot studs projecting from opposite sides of said spacing block and disposed in said seats, spacing members disposed between the outey,1P ends of said beams, a bell crank pivoted in said supporting frame, means for operating said bell crank, land a connection between said bell crank and the Walking' beam.

6. In a pumping jack of the class described, a supporting frame, a bell crank pivoted in said frame, means for operating said bell crank, a walking beam pivoted on said frame and comprising a pair of spaced beams, a spacing member for spacing one end of said beams comprising a block, a plate secured thereto and overlying the upper edges of the end portions of said beams, said plate having a plurality of seats therein, and an end plate connected with said block and the other plate and engaging the ends of said beams, an .additional spacing member disposed between the other ends of 7. In a pumping jack of the class described, a supporting frame, a vbell crank pivoted therein, means for operating said bell crank, a Walking beam pivoted on said ,frame and comprising a pair' of spaced beams, a spacing member disposed bteween `one end of said beam and comprising a block, a plate connected to said block and overlying the upper edges of said beams, one end of said plate being disposed beyond the end of said block .and having a slot formed therein to provide a pair of fingers l having alined seats, a pump rod disposed in said seats, an additional spacing member disposed between the outer ends of said beams, and a connection between said Walki ing beam and the bell crank.

Dated this 19th day of April, 1915.

WILLIAM M. BEST. WINTFORD P. CUNNINGHAM. 

